CN1497554A - Optical head device - Google Patents
Optical head device Download PDFInfo
- Publication number
- CN1497554A CN1497554A CNA031603629A CN03160362A CN1497554A CN 1497554 A CN1497554 A CN 1497554A CN A031603629 A CNA031603629 A CN A031603629A CN 03160362 A CN03160362 A CN 03160362A CN 1497554 A CN1497554 A CN 1497554A
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- CN
- China
- Prior art keywords
- lens
- maintaining part
- coil
- vibration
- clamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000012141 concentrate Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000007767 bonding agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0932—Details of sprung supports
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0933—Details of stationary parts
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0935—Details of the moving parts
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
Provided is an optical head device for efficiently suppressing the resonance of a lens holder and reducing the weight of the lens holder. In a lens holder 3 of an optical head device 1, a lens holding portion 35 is projected from a coil holding portion 31 for holding driving coils 4, 5 and the lens holding portion 35 is reduced in thickness. The lens holding portion 35 is shaped like a ring so as to concentrate vibrations to vibrations in a focusing direction, the vibrations are suppressed by a first vibration absorbing member 11. Ribs are eliminated from the lens holding portion 35 so as to concentrate vibrations to vibrations in a tracking direction, the vibrations are suppressed by a second vibration absorbing member 12.
Description
Technical field
The present invention relates to the optical-head apparatus that uses in the record regenerating of optical recording media, the vibration that particularly relates to the object lens in this optical-head apparatus prevents technology.
Background technology
For example, shown in Fig. 5 (A), (B), the optical-head apparatus that the record regenerating of the optical recording media of CD, CD-R, DVD etc. is used comprises: the lens clamp 3 that keeps object lens 2; Support 4 wires 4 of this lens clamp 3; The drive coil 6 that drive coil of using with the affixed focus direction of lens clamp 35 and tracking direction are used; And these drive coils 5,6 produce the drive magnet 7,8 of the magnetic flux of interlinkages relatively.The driving loop (not shown) of drive coil 5,6 usefulness is configured in a side of the fixed component (not shown) that is fixed with electric wire 4, to the power supply of drive coil 5,6 electric wire 4 is carried out as supply lines.
In the past, lens clamp 3 was forms of being disposed at this center with object lens 2 as main flow, and in the optical-head apparatus shown in, lens clamp 3 comprises therein: the coil maintaining part 31 that keeps drive coil 4,5; And stretch out and object lens 2 are kept in the above lens maintaining part 35 from coil maintaining part 31 is distolateral forward.
In the optical-head apparatus of this structure,, can will keep the lens clamp 3 of object lens 2 to drive towards focus direction and tracking direction in case, then utilize consequent Lorentz force to drive coil 5,6 energisings.At this moment, if object lens 2 vibrate, then can not correctly carry out the record regenerating of optical recording media.For this vibration, when object lens 2 are disposed at the center of lens clamp 3, the centre of gravity place of lens clamp 3 biases toward the center of object lens 2, be difficult for causing resonance, and, even caused resonance, also has the tendency that influence is not easy to come to the surface, but in the optical-head apparatus shown in Fig. 5 (A), (B), the structure that has adopted lens maintaining part 35 to stretch out from coil maintaining part 31, cause causes resonance easily, and lens maintaining part 35 is more in light weight than coil maintaining part 31, so exist the tendency that object lens 2 are resonated easily to be influenced.
For this reason, adopted by the thickness that strengthens lens maintaining part 31 parts and improved the technology of rigidity, but in recent years, required from the slimming that optical-head apparatus is proposed with supression resonance influence, shown in Fig. 5 (A), (B), lens maintaining part 31 is trending towards slimming.
Therefore, even also can restrain the influence of resonance in order to realize slimming, for lens maintaining part 31, by being provided with and coil maintaining part 31 wide width part 351 of constant amplitude roughly, surround object lens 2 flat shape on every side by leading section 352 being made to strengthen from this wide width part 351, with guarantee object lens 2 around have a big area, improve the rigidity of lens maintaining part 35.
Yet, when making 31 slimmings of lens maintaining part, when realizing lens maintaining part 31 large tracts of landization, the problem of big the manifesting of vibration resemble the trampoline has taken place in the plane of lens maintaining part 31 but.
Again, when making 31 slimmings of lens maintaining part, the present patent application people, attempts in the side surface part of lens maintaining part 31 rib 36 being set as a measure that needs to improve its foundation partially rigid shown in Fig. 6 (A), (B).
But, in order to make 31 slimmings of lens maintaining part, if rib 36 is set, the new problem that lens maintaining part 31 twists and vibrates has appearred then.
In view of the above-mentioned problems, problem of the present invention is, even provide the slimming of a kind of lens maintaining part also can restrain the optical-head apparatus of object lens vibration effectively.
Summary of the invention
In order to solve above-mentioned problem, the optical-head apparatus of the present invention's the 1st technical scheme comprises: the lens clamp that is equipped with object lens and drive coil; And this lens clamp propped up a plurality of elasticity support member that are held in focus direction and tracking direction movably, it is characterized in that described lens clamp has: the coil maintaining part that keeps drive coil; And from distolateral forward stretch out, the lens maintaining part that keeps described object lens of this coil maintaining part, described lens maintaining part forms the shape thinner than described coil maintaining part and disturbs with the deflection element of avoiding and be disposed at this lens maintaining part lower position, have simultaneously portion from the side with front as circular-arc flat shape along the peripheral shape of described object lens, and, the 1st vibration attraction member is installed in the whose forwardmost end portions of this lens maintaining part.
Want to make the lens maintaining part large tracts of landization of slimming to improve its rigidity, owing in the plane of lens maintaining part, can cause big vibration, therefore in the 1st technical scheme of the present invention, for the lens maintaining part, have portion from the side with front as circular-arc flat shape, to restrain the vibration in the lens maintaining part plane along the peripheral shape of described object lens.Again, single when adopting this structure, owing in the residual one-sided vibration (vibration of direction outside face) that has the focus direction of its foundation part of lens maintaining part, therefore attract member, also can restrain this one-sided vibration by the 1st vibration is installed in the whose forwardmost end portions of lens maintaining part.That is, in the present invention,, make the vibration of focus direction intensive, attract member to restrain this vibration by the 1st vibration in the leading section of lens maintaining part by the lens maintaining part is made roughly ring-type.Like this, adopt the present invention, even the slimming of lens maintaining part also can be restrained the resonance of object lens effectively.
Optical-head apparatus in the 2nd technical scheme of the present invention comprises: the lens clamp that is equipped with object lens and drive coil; And link, this lens clamp is propped up a plurality of elasticity support member that are held in tracking direction and focus direction movably with this lens clamp, it is characterized in that described lens clamp has: the coil maintaining part that keeps drive coil; And the lens maintaining part of stretching out from this coil maintaining part, keep described object lens, described lens maintaining part forms the shape thinner than described coil maintaining part and disturbs with the deflection element of avoiding and be disposed at this lens maintaining part lower position, and is equipped with 1 so that the 2nd a plurality of vibrations attracts member in the position of the boundary member that is equivalent to described coil maintaining part and described lens maintaining part.
When making the slimming of lens maintaining part, improve rigidity if rib partly is set in its foundation, then can make manifesting of twisting vibration, for this reason, in the 2nd technical scheme of the present invention, partly saved rib from foundation, caused the vibration of the tracking direction of manifesting and attract member to restrain because of saving rib by the 2nd vibration.That is, in the present invention,, can make the vibration of tracking direction intensive, attract member to restrain this vibration by the 2nd vibration in the foundation part of lens maintaining part by from lens clamp, having taken down rib.Like this, adopt the present invention, even the slimming of lens maintaining part also can be restrained the resonance of object lens effectively.
In the present invention, also can be with both sides' combination of the 1st technical scheme and the 2nd technical scheme.Promptly, in the 2nd technical scheme of the present invention, the same with the 1st technical scheme, described lens maintaining part also can have the circular-arc flat shape of the peripheral shape of portion to front along described object lens from the side, and in the whose forwardmost end portions of this lens maintaining part the 1st vibration attraction member is installed.
In sum, in the present invention, at first,, make the vibration of focus direction intensive, attract member to restrain this vibration by the 1st vibration in the leading section of lens maintaining part by the lens maintaining part is made roughly ring-type.Like this, adopt the present invention, even the slimming of lens maintaining part also can be restrained the resonance of object lens effectively.
Again, in the present invention,, can make the vibration of tracking direction intensive, attract member to restrain this vibration by the 2nd vibration in the foundation part of lens maintaining part by from lens clamp, having taken down rib.Like this, adopt the present invention, even the slimming of lens maintaining part also can be restrained the resonance of object lens effectively.
The simple declaration of accompanying drawing
Fig. 1 (A), (B) are respectively planimetric map and the stereographic map that the optical-head apparatus of representing the embodiment of the invention 1 is wanted portion's structure.
Fig. 2 (A), (B) are respectively stereographic map and the longitudinal diagram thereof that expression optical-head apparatus shown in Figure 1 is wanted the partial cut of portion.
Fig. 3 wants the stereographic map of portion's structure for the optical-head apparatus of the expression embodiment of the invention 2.
Fig. 4 wants the stereographic map of portion's structure for the optical-head apparatus of the expression embodiment of the invention 3.
Fig. 5 (A), (B) are respectively planimetric map and the stereographic map that the traditional optical-head apparatus of expression is wanted portion's structure.
Fig. 6 (A), (B) are respectively planimetric map and the stereographic map that another traditional optical-head apparatus of expression is wanted portion's structure.
Embodiment
Embodiments of the invention are described with reference to the accompanying drawings.In addition, below the basic structure of Shuo Ming embodiment is with traditional identical, so describe at general part mark prosign.
[the 1st embodiment]
Fig. 1 (A), (B) are respectively planimetric map and the stereographic map that the optical-head apparatus of representing the embodiment of the invention 1 is wanted portion's structure.Fig. 2 (A), (B) are respectively stereographic map and the longitudinal diagram that expression optical-head apparatus shown in Figure 1 is wanted the partial cut of portion.In Fig. 1 (B), omitted the diagram of electric wire and drive magnet etc.
Among Fig. 1 and Fig. 2, this routine optical-head apparatus 1 is used for the optical recording media of CD, CD-R, DVD etc. is carried out record regenerating, comprising: the lens clamp 3 that keeps object lens 2; By 4 wires 4 and support the fixed component (not shown) of this lens clamp 3; With the drive coil 5 of the affixed focusing usefulness of lens clamp 3 with follow the tracks of the drive coil 6 of usefulness; And these drive coils 5,6 produce the drive magnet 7,8 of the magnetic flux of interlinkages relatively.The driving loop (not shown) of drive coil 5,6 usefulness is configured in fixed component one side, and the power supply of drive coil 5,6 is carried out as supply lines with electric wire 4.
In this routine optical-head apparatus 1, lens maintaining part 35 form than coil maintaining part 31 thin the shape of Duoing, disturb with the deflection element 9 of avoiding catoptron etc., can make 35 lightweights of coil maintaining part with the oblique total reflection that is disposed at lens maintaining part 35 lower positions.
Yet in case lens maintaining part 35 attenuates, the rigidity of lens maintaining part 35 descends and lightens, and causes 5 resonance of coil maintaining part under this state easily.But in this example, do not adopt the area of spread loop maintaining part 35 to improve the method for rigidity, but coil maintaining part 35 is made the roughly structure of ring-type.
That is, lens maintaining part 35 comprises: from the wide width part 356 of coil maintaining part 31 constant amplitudes extension; At crooked to the inside and laterally inclined rake 357 with the boundary portion office of this wide width part 356; And have from the boundary member (side surface part) of this rake 357 with leading section 358 as circular-arc flat shape along the outer peripheral edges of object lens 2.
Again, in this example, be provided with par 350, the 1st vibration be installed on this par 350 attract member 11 at the front end of lens maintaining part 35.It is exactly with elastic adhesive and thermmohardening type bonding agent metal weight members 111 to be fixed on impact damper on the lens clamp 3 through the elastic component 112 of rubber etc. that the 1st vibration attracts member 11.
In the optical-head apparatus 1 of this structure, in case, then can utilize consequent Lorentz force will keep the lens clamp 3 of object lens 2 to drive towards focus direction and tracking direction to drive coil 5,6 energisings.
At this moment, on lens clamp 3, lens maintaining part 31 is the shapes of stretching out from coil maintaining part 35, and slimming.Like this, lens maintaining part 35 has reduced rigidity because of light-weighted part.But in the present embodiment, for lens maintaining part 35, at first by portion from the side with front as the vibration of having restrained along the circular-arc flat shape of object lens 2 peripheral shape in lens maintaining part 35 planes.Again, if this structure of single employing, the then residual one-sided vibration (vibration of direction outside face) of meeting on lens maintaining part 35 to its foundation focus direction partly, therefore, in the whose forwardmost end portions of lens maintaining part 35 the 1st vibration is installed and attracts member 11, also can restrain this one-sided vibration.That is, the vibration of focus direction is intensive in the leading section of lens maintaining part 35 in this example by lens maintaining part 35 is made roughly ring-type, attract member 11 to restrain this vibration by the 1st vibration.Like this, adopt the present invention, even 35 slimmings of lens maintaining part also can be restrained the resonance of object lens 2 effectively.
Again, owing to make 35 slimmings of lens maintaining part, therefore can make lens clamp 3 lightweights, and, lower position at object lens 2, even approaching the position configuration deflection element 9 of object lens 2, deflection element 9 can not disturb with lens clamp 3 yet, can realize the lightweight and the slimming of overall optical head unit 1.
[the 2nd embodiment]
Fig. 3 wants the stereographic map of portion for the optical-head apparatus of the expression embodiment of the invention 2.This routine basic structure is identical with embodiment 1, so illustrated at the part mark prosign with same function, omits its explanation.In Fig. 3, electric wire and drive magnet etc. have been omitted.
Among Fig. 3, this routine optical-head apparatus 1 is also the same with embodiment 1, and lens clamp 3 comprises: the coil maintaining part 31 that keeps drive coil 4,5; And from the distolateral forward lens maintaining part 35 of stretching out, in the above object lens 2 being kept of coil maintaining part 31.
Again, lens maintaining part 35 is the same with embodiment 1, comprising: from the wide width part 356 of coil maintaining part 31 constant amplitudes extension; At crooked to the inside and laterally inclined rake 357 with the boundary portion office of this wide width part 356; And have from the boundary member (side surface part) of this rake 357 with leading section 358 as circular-arc flat shape along the outer peripheral edges of object lens 2, formed roughly ring-type.
In this routine optical-head apparatus 1, lens maintaining part 35 forms much thinner that shape is disturbed with the deflection element (with reference to Fig. 2 (A), (B)) of the catoptron of the oblique total reflection that is disposed at lens maintaining part 35 lower positions etc. avoiding than coil maintaining part 31, can make 35 lightweights of lens maintaining part.
Like this, in this example, because of the part of lens maintaining part 35 attenuates has reduced the rigidity of lens clamp 3, and lens maintaining part 31 is lighter than coil maintaining part 35.But in this example, on lens maintaining part 35, do not adopt the sort of method of rib that is provided with that illustrated with reference to Fig. 6 (A), (B), promptly the left and right sides above the foundation part in lens maintaining part 35 is installed by the structure that the 2nd vibration attracts member 12 respectively but adopt at the coil maintaining part 31 and the boundary member of lens maintaining part 35.Wherein, to attract member 12 be exactly that metal weight members 121 usefulness elastic adhesives and thermmohardening type bonding agent are fixed on impact damper on the lens clamp 3 with metal weight members 121 through the elastic component 122 of rubber etc. in vibration.
In the optical-head apparatus 1 of this structure, also be in case, then can utilize consequent Lorentz force will keep the lens clamp 3 of object lens 2 to drive towards focus direction and tracking direction to drive coil 5,6 energisings.
At this moment, foundation part in lens maintaining part 35 improves rigidity as if the rib that is provided with shown in Fig. 6 (A), (B), then can make manifesting of twisting vibration, for this reason, in this example, partly saved rib from foundation, caused the vibration of the tracking direction of manifesting and attract member to restrain because of saving rib by the 2nd vibration.That is, the vibration of tracking direction is intensive in the foundation part of lens maintaining part 35 in this example by having taken down rib from lens maintaining part 35, attract member 12 to restrain this vibration by the 2nd vibration.Like this, adopt the present invention, even 35 slimmings of lens maintaining part also can be restrained the resonance of object lens 2 effectively.
In this example, also be to make 35 slimmings of lens maintaining part, so can make lens clamp 3 lightweights, and, even approaching the position configuration deflection element of object lens 2, deflection element and lens clamp 3 can not disturb yet, and can realize the lightweight and the slimming of overall optical head unit 1.
[the 3rd embodiment]
Fig. 4 wants the stereographic map of portion's structure for the optical-head apparatus of the expression embodiment of the invention.This routine basic structure is identical with embodiment 1,2, so illustrated at the part mark prosign with same function, omits its explanation.In Fig. 4, electric wire and drive magnet etc. have been omitted.
Among Fig. 4, this routine optical-head apparatus 1 is also the same with embodiment 1,2, and lens clamp 3 comprises: the coil maintaining part 31 that keeps drive coil 4,5; And from the distolateral forward lens maintaining part 35 of stretching out, in the above object lens 2 being kept of coil maintaining part 31.
Again, lens maintaining part 35 is the same with embodiment 1, comprising: from the wide width part 356 of coil maintaining part 31 constant amplitudes extension; At crooked to the inside and laterally inclined rake 357 with the boundary member of this wide width part 356; And have from the boundary member (side surface part) of this rake 357 with leading section 358 as circular-arc flat shape along the outer peripheral edges of object lens 2, form roughly ring-type.On lens maintaining part 35, be not formed with rib shown in Fig. 6 (A), (B) again.
The same with embodiment 1 in this example, front end in lens maintaining part 35 is provided with par 350, the 1st vibration is installed on this par 350 attracts member 11, on lens maintaining part 35, attract member 11 to restrain one-sided vibration (vibration of direction outside face) the focus direction of its foundation part by the 1st vibration.That is, the vibration of focus direction is intensive in the leading section of lens maintaining part 35 in this example by lens maintaining part 35 is made roughly ring-type, attract member 11 to restrain this vibration by the 1st vibration.
Again, the same with embodiment 2, the left and right sides on the foundation part of lens maintaining part 35 is separately installed with the 2nd vibration and attracts member 12, like this, this example also is by having saved rib, attracts member to restrain because of saving rib by the 2nd vibration and causes the vibration of the tracking direction of manifesting.That is, the vibration of tracking direction is intensive in the foundation part of lens maintaining part 35 in this example by having taken down rib from lens maintaining part 35, attract member 12 to restrain this vibration by the 2nd vibration.Like this, adopt the present invention, even 35 slimmings of lens maintaining part also can be restrained the resonance of object lens 2 effectively.
[other embodiment]
In the above-described embodiments, attract member 11,12 to adopt as vibration metal counterbalance weight portion is fixed on impact damper on the lens clamp 3 via elastic component, but also can adopt adhesive strip by bonding agent.
Again, the vibration that is installed on lens clamp 3 attracts the number of member 11,12 to be not limited to 1 or 2, also can be its above number.
Again, impact damper also can be made of the material softer than optical recording disk, and the buffer component when can be used as the disc collision utilizes.
Claims (3)
1. an optical-head apparatus comprises: the lens clamp that is equipped with object lens and drive coil; And this lens clamp propped up a plurality of elasticity support member that are held in focus direction and tracking direction movably, it is characterized in that,
Described lens clamp has: the coil maintaining part that keeps drive coil; And from distolateral forward stretch out, the lens maintaining part that keeps described object lens of this coil maintaining part,
Described lens maintaining part forms the shape thinner than described coil maintaining part and disturbs with the deflection element of avoiding and be disposed at this lens maintaining part lower position, have simultaneously portion from the side with front along the peripheral shape of described object lens as circular-arc flat shape, and, the 1st vibration attraction member is installed in the whose forwardmost end portions of this lens maintaining part.
2. an optical-head apparatus comprises: the lens clamp that is equipped with object lens and drive coil; And link, this lens clamp is propped up a plurality of elasticity support member that are held in tracking direction and focus direction movably with this lens clamp, it is characterized in that,
Described lens clamp has: the coil maintaining part that keeps drive coil; And the lens maintaining part of stretching out from this coil maintaining part, keep described object lens,
Described lens maintaining part forms the shape thinner than described coil maintaining part and disturbs with the deflection element of avoiding and be disposed at this lens maintaining part lower position,
Be equipped with 1 so that the 2nd a plurality of vibrations attracts member in the position of the boundary member that is equivalent to described coil maintaining part and described lens maintaining part.
3. optical-head apparatus as claimed in claim 2, it is characterized in that, described lens maintaining part have portion from the side with front as circular-arc flat shape along the peripheral shape of described object lens, in the whose forwardmost end portions of this lens maintaining part the 1st vibration is installed and attracts member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002289477 | 2002-10-02 | ||
| JP2002289477A JP2004127415A (en) | 2002-10-02 | 2002-10-02 | Optical head device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1497554A true CN1497554A (en) | 2004-05-19 |
| CN1294574C CN1294574C (en) | 2007-01-10 |
Family
ID=32281632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031603629A Expired - Fee Related CN1294574C (en) | 2002-10-02 | 2003-09-25 | Optical head device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7225453B2 (en) |
| JP (1) | JP2004127415A (en) |
| CN (1) | CN1294574C (en) |
| TW (1) | TWI247297B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100409330C (en) * | 2004-06-16 | 2008-08-06 | 株式会社日立媒介电子 | Objective lens driving apparatus and optical disk apparatus |
| CN100426393C (en) * | 2005-07-07 | 2008-10-15 | Tdk株式会社 | Optical head device and optical recording/reproducing apparatus utilizing the same |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006302334A (en) * | 2005-04-15 | 2006-11-02 | Sanyo Electric Co Ltd | Pickup device |
| US20080278828A1 (en) * | 2005-07-14 | 2008-11-13 | Carl Zeiss Smt Ag | Optical Element |
| JP4366404B2 (en) * | 2007-01-17 | 2009-11-18 | 株式会社日立メディアエレクトロニクス | Objective lens driving device and disk device using the same |
| JP2009140550A (en) * | 2007-12-05 | 2009-06-25 | Panasonic Corp | Lens drive unit, optical pickup device, and optical disk unit |
| JP2008186587A (en) * | 2008-05-07 | 2008-08-14 | Sumida Corporation | Objective lens driving device |
| JP5374544B2 (en) * | 2011-05-19 | 2013-12-25 | 株式会社日立メディアエレクトロニクス | Optical pickup |
| US8736988B2 (en) * | 2012-07-19 | 2014-05-27 | Hong Kong Applied Science And Technology Research Institute Co. Ltd. | Compact imaging device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2598530B2 (en) * | 1989-10-30 | 1997-04-09 | 株式会社三協精機製作所 | Object pickup lens driving device for optical pickup |
| JP3561378B2 (en) * | 1996-09-02 | 2004-09-02 | 日本発条株式会社 | Objective lens actuator |
| JP2000222753A (en) * | 1999-02-02 | 2000-08-11 | Sony Corp | Objective lens driving device and manufacturing method of the same |
| JP2000235719A (en) * | 1999-02-15 | 2000-08-29 | Sankyo Seiki Mfg Co Ltd | Objective lens driving device |
| JP3500094B2 (en) * | 1999-06-08 | 2004-02-23 | 三洋電機株式会社 | Optical pickup |
| JP2001344784A (en) * | 2000-03-29 | 2001-12-14 | Matsushita Electric Ind Co Ltd | Lens drive device, optical pickup using the device, and method for manufacturing lens driving device |
| JP3633491B2 (en) * | 2001-02-05 | 2005-03-30 | ティアック株式会社 | Optical pickup device |
| JP2005216357A (en) * | 2004-01-28 | 2005-08-11 | Teac Corp | Optical pickup device |
-
2002
- 2002-10-02 JP JP2002289477A patent/JP2004127415A/en not_active Withdrawn
-
2003
- 2003-09-19 TW TW092125892A patent/TWI247297B/en not_active IP Right Cessation
- 2003-09-25 CN CNB031603629A patent/CN1294574C/en not_active Expired - Fee Related
- 2003-09-30 US US10/676,861 patent/US7225453B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100409330C (en) * | 2004-06-16 | 2008-08-06 | 株式会社日立媒介电子 | Objective lens driving apparatus and optical disk apparatus |
| US7443771B2 (en) | 2004-06-16 | 2008-10-28 | Hitachi Media Electronics Co., Ltd. | Objective lens driving apparatus having bottom plate forming a projecting part |
| CN100426393C (en) * | 2005-07-07 | 2008-10-15 | Tdk株式会社 | Optical head device and optical recording/reproducing apparatus utilizing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI247297B (en) | 2006-01-11 |
| US20040128679A1 (en) | 2004-07-01 |
| CN1294574C (en) | 2007-01-10 |
| TW200415631A (en) | 2004-08-16 |
| US7225453B2 (en) | 2007-05-29 |
| JP2004127415A (en) | 2004-04-22 |
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